From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751534Ab2ILHXU (ORCPT ); Wed, 12 Sep 2012 03:23:20 -0400 Received: from na3sys009aog117.obsmtp.com ([74.125.149.242]:33931 "EHLO na3sys009aog117.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750708Ab2ILHXS (ORCPT ); Wed, 12 Sep 2012 03:23:18 -0400 From: wzch To: Russell King , Dave Martin , Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Wenzeng Chen Subject: [PATCH] ARM: suspend: use flush range instead of flush all Date: Wed, 12 Sep 2012 15:18:48 +0800 Message-Id: <1347434328-7207-1-git-send-email-wzch@marvell.com> X-Mailer: git-send-email 1.7.1 X-OriginalArrivalTime: 12 Sep 2012 07:18:52.0653 (UTC) FILETIME=[DCCDB9D0:01CD90B6] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wenzeng Chen In cpu suspend function __cpu_suspend_save(), we save cp15 registers, resume function, sp and suspend_pgd, then flush the data to DDR, but no need to flush all D cache, only need to flush range. Change-Id: I591a1fde929f3f987c69306b601843ed975d3e41 Signed-off-by: Wenzeng Chen --- arch/arm/kernel/suspend.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/arch/arm/kernel/suspend.c b/arch/arm/kernel/suspend.c index 1794cc3..bb582d8 100644 --- a/arch/arm/kernel/suspend.c +++ b/arch/arm/kernel/suspend.c @@ -17,6 +17,7 @@ extern void cpu_resume_mmu(void); */ void __cpu_suspend_save(u32 *ptr, u32 ptrsz, u32 sp, u32 *save_ptr) { + u32 *ptr_orig = ptr; *save_ptr = virt_to_phys(ptr); /* This must correspond to the LDM in cpu_resume() assembly */ @@ -26,7 +27,8 @@ void __cpu_suspend_save(u32 *ptr, u32 ptrsz, u32 sp, u32 *save_ptr) cpu_do_suspend(ptr); - flush_cache_all(); + __cpuc_flush_dcache_area((void *)ptr_orig, ptrsz); + __cpuc_flush_dcache_area((void *)save_ptr, sizeof(*save_ptr)); outer_clean_range(*save_ptr, *save_ptr + ptrsz); outer_clean_range(virt_to_phys(save_ptr), virt_to_phys(save_ptr) + sizeof(*save_ptr)); -- 1.7.1